KIF 2.0.0

KIF 2.0.0 is a major rewrite of KIF's test execution mechanism to work on top of ocunit. Tests are now executed sequentially as they appear in code rather than through steps and scenarios.

For example:

[tester tapViewWithAccessibilityLabel:@"Next"];

Instead of the traditional:

[scenario addStep:[KIFTestStep stepToTapViewWithAccessibilityLabel:@"Next"]];